JP2007095200A - Disk case and disk guide member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk case and a disk guide member by which a magnetic disk wherein expected performance can be obtained and glide height of a magnetic head can be narrowed can be manufactured when a glass substrate for the magnetic disk is manufactured and the magnetic disk is manufactured. <P>SOLUTION: The disk case is provided with a case main body part 10 having a plurality of groove parts housing and holding disks 12 and a guide member 30 attachable to and detachable from the case main body part 10 and having a plurality of guide plates 31 whose parts between guide plates 31 correspond to the groove parts of the case main body part 10. Each guide plate 31 is provided with a protective material 35 having a polishing property to the disk 12 equal to or lower than that of a polishing cloth used for polishing processing performed to the disk 12 after the disk 12 is housed in the disk case, e.g. a final polishing processing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disk case and a disk guide member used in a manufacturing process of a glass substrate for a magnetic disk used in a hard disk drive (HDD) which is a magnetic disk device.

  Today, information recording technology, particularly magnetic recording technology, is required to undergo dramatic technological innovation with the development of the so-called IT industry. Unlike other magnetic recording media such as magnetic tapes and flexible disks, the magnetic disk mounted on a hard disk drive (HDD), which is a magnetic disk device used as a computer storage, is rapidly increasing in information recording density. Has been continued. The information capacity that can be stored in the personal computer device has been dramatically increased, supported by such an increase in the information recording density of the magnetic disk.

  Such a magnetic disk is configured by forming a magnetic layer or the like on a substrate such as a glass substrate or an aluminum alloy disk substrate. In particular, in recent years, with increasing demand for mounting hard disk drives in portable devices (so-called “notebook personal computer devices”, etc.), they have high strength, high rigidity, and high impact resistance. A magnetic disk using a glass substrate has attracted attention.

  In the hard disk drive, an information signal is recorded and reproduced as a magnetization pattern on the magnetic layer by the magnetic head while flying over the magnetic disk rotated at high speed. In a magnetic disk using a glass substrate, since a smooth surface can be obtained, the flying height of the magnetic head can be reduced, and a high information recording density can be realized. That is, by using a glass substrate, a magnetic disk excellent in the low flying height compatibility of the magnetic head can be manufactured.

  A glass substrate for a magnetic disk used for manufacturing such a magnetic disk is manufactured through a plurality of processes such as a grinding process, a polishing process, and a cleaning process. If there is foreign matter on the surface of the magnetic disk glass substrate, the reliability of the magnetic disk or hard disk drive will be reduced, and in some cases there may be problems such as glide hits and crashes. The surface of the substrate must be smooth and clean.

  By the way, the glass substrate for magnetic disks in a manufacturing process is easy to receive a damage | wound, and thickness is also as thin as about 0.6 mm. Therefore, when storing and transporting glass substrates that have undergone processing in each process and each process, the glass substrates may be in contact with each other or may be damaged due to contact with other things. It is necessary not to.

  Therefore, a disk case has been proposed for storing and holding a plurality of glass substrates (disks) at predetermined intervals when processing, storing and transporting glass substrates. As such a disk case, for example, as described in Patent Document 1, a storage lane whose upper side is opened, and a plurality of grooves formed on the inner wall of the storage lane for storing and holding a glass substrate, Have been proposed.

  In manufacturing a magnetic disk, a thin film such as a magnetic layer is formed on a glass substrate for a magnetic disk manufactured using such a disk case by a method such as sputtering.

Japanese Patent Laid-Open No. 10-228643

  Incidentally, in recent magnetic disks, as described above, the spacing loss between the magnetic disk and the magnetic head has been improved and the S / N ratio of the recording signal has been improved, resulting in an information recording density of 1 square inch. It has reached 40 gigabits per unit, and an ultra-high recording density that exceeds 100 gigabits per square inch is also being realized.

  In recent magnetic disks that can realize such a high information recording density, it is possible to store a practically sufficient amount of information even if the disk area is much smaller than that of a conventional magnetic disk. Have. In addition, the magnetic disk has a feature that information recording speed and reproduction speed (response speed) are extremely fast compared with other information recording media, and information can be written and read at any time. .

  As a result of attention paid to various features of such magnetic disks, in recent years, portable so-called MP3 players, mobile phone devices, digital cameras, and portable information devices (for example, PDA (personal digital assistant)) Alternatively, there is a need for a small hard disk drive that can be mounted on a device that is much smaller than a personal computer device and requires a high response speed, such as a “car navigation system”.

  However, the following problems have arisen in the magnetic disk glass substrate having such a reduced diameter. That is, when processing, storing and transporting a glass substrate, when using a disk case for storing and holding a plurality of glass substrates at a predetermined interval as described above, the glass substrate is to be inserted into the disk case. At this time, the glass substrate may come into contact with another glass substrate already stored and held in the disk case. Thus, when the glass substrates are in contact with each other, there is a high possibility that the main surface portion and the end surface portion will be damaged in any glass substrate.

  If such a scratch occurs in the glass substrate for magnetic disk, fly stiction failure may occur frequently when the flying height of the magnetic head is narrowed to increase the recording density. The fly stiction failure is a failure in which the magnetic head flying above the magnetic disk modulates the flying posture and the flying height, and is often accompanied by irregular reproduction output fluctuations. Further, when this fly stiction failure occurs, a so-called head crash failure or thermal asperity failure in which the flying magnetic head comes into contact with the magnetic disk may occur.

  Therefore, the present invention has been made in view of the above-described circumstances, and an object of the present invention is to manufacture a magnetic disk glass substrate, which is a disk, and to obtain a desired performance when manufacturing a magnetic disk. Another object of the present invention is to provide a disk case and a disk guide member capable of manufacturing a magnetic disk capable of sufficiently narrowing the glide height of a magnetic head.

  As a result of researches to solve the above-mentioned problems, the present inventor carried out the polishing performance for the disk in the manufacturing process after the disk was stored in the disk case for the disk. It was found that the damage to the disc could be prevented by contacting only a protective material equivalent to or less than the polishing cloth for performing the polishing process, for example, the final polishing process. The present invention has been completed on the basis of such knowledge, and prevents damage to the disk during the manufacturing process, for example, enabling the manufacture of a low glide height magnetic disk.

  That is, the disk case according to the present invention has at least one of the following configurations.

[Configuration 1]
A case body having at least an upper storage lane and a plurality of grooves for storing and holding a disk formed on the inner wall of the storage lane; A plurality of guide plates and a guide member corresponding to a plurality of groove portions of the case main body portion between the plurality of guide plates when mounted on the case main body portion, and each guide plate of the guide member, In order to perform a polishing process performed after the disc is polished in the disc case at a location where the disc contacts when the disc is inserted between the guide plates. It is equipped with a protective material equivalent to or less than that of the polishing cloth, and guides the disc inserted between the guide plates into the groove of the case body. It is an butterfly.

[Configuration 2]
At least the upper part is opened, and the inner wall has a plurality of grooves for storing and holding the disk, and these grooves have a polishing property for the disk at a position where the disk contacts when the disk is inserted into the groove. This disk is provided with a protective material that is equivalent to or less than a polishing cloth for performing a polishing process that is performed after the disk is stored in the disk case.

  The disc guide member according to the present invention has the following configuration.

[Configuration 3]
A disc case having at least a storage lane open at the top and a plurality of groove portions for storing and holding the disc formed on the inner wall of the storage lane is detachable from the upper side and has a plurality of guide plates. The disc guide member is configured so that a plurality of guide plates correspond to a plurality of groove portions of the disc case when mounted on the disc case, and each guide plate has a disc inserted between the guide plates. The abrasiveness to this disc is sometimes equal to or less than that of the polishing cloth for performing the polishing process performed after the disc is stored in the disc case at the location where the disc comes into contact. It is equipped with a protective material, and guides the disc inserted between the guide plates into the groove of the disc case. A.

  In the disc case according to the present invention having the configuration 1, each guide plate of the guide member that is detachable from the case main body comes into contact with the disc when the disc is inserted between the guide plates. A protective material that is equivalent to or less than a polishing cloth for performing a polishing process that is performed after the disc is polished in the disc case is provided at a location. Since the disc inserted between the guide plates is guided into the groove of the case main body, the disc polishability with respect to this disc is stored in this disc case with respect to this disc during the manufacturing process. Only protective materials that are equivalent to or less than the polishing cloth for performing the polishing process that is performed after that can be contacted. The Kizuson in risk can be prevented.

  Further, in the disc case according to the present invention having the configuration 2, the plurality of groove portions for storing and holding the disc have an abrasive property with respect to the disc at a position where the disc contacts when the disc is inserted into the groove portion. Is provided with a protective material that is equivalent to or less than an abrasive cloth for performing a polishing process performed after the disc is stored in the disc case. On the other hand, only the protective material that is equal to or less than the polishing cloth for performing the polishing process performed after the disc is polished in the disc case is contacted with the disc. This can prevent damage to the disc.

  In the disk guide member according to the present invention having the configuration 3, each guide plate has an abrasive property with respect to the disk at a position where the disk contacts when the disk is inserted between the guide plates. And a protective material that is equivalent to or less than a polishing cloth for performing a polishing process performed after being stored in the disk case, and the disk inserted between the guide plates is a disk. Since the guide is guided into the groove portion of the case, a polishing cloth for performing a polishing process to be performed after the disk is in the manufacturing process after the disk is polished in the disk case. Only the protective material equivalent to or lower than can be brought into contact with each other, and damage to the disk can be prevented.

  That is, the present invention produces a magnetic disk glass substrate that is a disk, and when producing the magnetic disk, the desired performance can be obtained and the glide height of the magnetic head can be sufficiently narrowed. Thus, it is possible to provide a disk case and a disk guide member that can be manufactured.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a perspective view showing a configuration of a disk case according to the present invention.

  As shown in FIG. 1, the disk case includes a case body 10 having a storage lane 10a at least opened upward and a plurality of grooves for storing and holding the disk 12 formed on the inner wall of the storage lane 10a. It is comprised. In addition, the disk case is configured to include a guide member 30 that is a disk guide member according to the present invention.

  FIG. 2 is a perspective view showing the configuration of the case body in the disc case according to the present invention.

  As shown in FIG. 2, the case main body 10 is configured to have a box-like shape in which the upper side and the lower side are opened. Then, the disk 12 is taken in and out from above the case body 10. The case body 10 includes a front wall 16 and a rear wall 18 that face each other, and a pair of side walls 20. A partition wall 21 is provided at the center position in the case body 10. In the case main body 10, two rows of storage lanes 10 a and 10 a for storing a plurality of disks 12 are formed with a partition wall 21 therebetween. At positions corresponding to the respective storage lanes 10a on the front wall 16 and the rear wall 18, a substantially U-shaped cutout portion 22 is formed. The vicinity of the central portion of the disk 12 stored in each storage lane 10 a is exposed to the outside through the notch 22.

  FIG. 3 is a front view showing the configuration of the case body in the disc case according to the present invention.

  At the upper ends of the pair of side walls 20, as shown in FIG. 3, in order to be able to hold the case main body 10 by a robot hand or the like, flange portions 20 d that protrude outward are formed. Yes. The side wall 20 includes an upper thin plate portion 20a, a tapered portion 20b whose thickness increases inwardly from the thin plate portion 20a, and a thick plate portion 20c having a maximum thickness of the tapered portion 20b. Is formed. Further, on both surfaces of the partition wall 21, corresponding to the side wall 20, an upper flat portion 21 a, a tapered portion 21 b that protrudes inward from the flat portion to the lower side, and a protrusion formed continuously from the tapered portion 21 b. A portion 21c is formed.

  In each storage lane 10a, the side wall 20 and the partition wall 21 are opposed to each other, so that the space between the side wall 20 and the partition wall 21 is wide at the upper side, and the side wall 20 is formed at the portion where the tapered portions 20b and 21b are formed. The distance between the partition walls 21 gradually decreases downward, and the distance between the side wall 20 and the partition wall 21 is the smallest at the portion where the thick plate portion 20c and the protruding portion 21c face each other. As a result, each storage lane 10a can stably hold the disk-shaped disk 12. In addition, between the lower end part of each side wall 20 and the lower end part of the partition 21, as shown in FIG.

  FIG. 4 is a plan view showing the configuration of the case body in the disc case according to the present invention.

  As shown in FIG. 4, a plurality of ribs 24 for forming grooves for accommodating the disk 12 and holding it upright are provided on the inner surface of each side wall 20 and both surfaces of the partition wall 21. As shown in FIGS. 2 and 3, the ribs 24 are formed from the thin plate portion 20a and the flat portion 21a of the side wall 20 and the partition wall 21 to the lower ends of the tapered portions 20b and 21b. 20 and the taper portions 20b and 21b of the partition wall 21 have a curved shape protruding inside the storage lane 10a.

  FIG. 5 is an enlarged side view showing the shape of the rib in the case main body.

  FIG. 6 is an enlarged perspective view showing a shape of a rib in the case main body.

  As shown in FIGS. 4 to 6, the ribs 24 of the case main body 10 are arranged with a space slightly larger than the thickness of the disk 12 to be stored. And each rib 24 forms the groove | channel which clamps the peripheral part of the disk 12 between each rib 24. FIG. Each rib 24 has a trapezoidal shape with a width that decreases inward in order to facilitate the insertion of the disk 12 from above the storage lane 10a.

  A frame portion 26 is formed below the front wall 16, the rear wall 18, the side wall 20, and the partition wall 21 of each storage lane 10 a so as to be fitted above the storage lane 10 a of the same case body 10. . The bottom surface of the frame portion 26 is formed flat so that the case main body portion 10 can be conveyed by a roller conveyor or the like.

  When the case main body 10 is immersed in the treatment liquid in order to perform chemical treatment on the disk 12, or when the disk 12 is washed in a state of being stored in the disk case, the liquid is discharged into the groove between the ribs 24. Slits can be formed. As a result, the treatment liquid and the cleaning liquid do not stay in the groove after the chemical treatment and the cleaning are completed.

  Such a case main body 10 is formed of a material such as a metal or a resin that can withstand a use environment such as a processing liquid used for processing the stored disk 12 and a processing temperature. In particular, from the viewpoint of manufacturing cost and finishing accuracy, it is preferable to integrally mold with resin. As such a resin, it is possible to use general resins such as various polyolefins such as polyethylene and polypropylene, polyvinyl chloride, and Teflon (registered trademark) (PTFE). In particular, when the disk case is manufactured by a normal injection molding method, examples of the resin include polycarbonate, polyamide, thermotropic liquid crystal polymer (LCP), polyetheretherketone (PEEK), polyetherketone (PEK), and PEEK. Alloy resin (for example, PEEK / thermotropic liquid crystal polymer, PEEK / polybenzimidazole (PBI), etc.), polybenzimidazole (PBI), polyphenylene sulfide (PPS), polyethersulfone (PES), polyetherimide (PEI), It is preferable to use a fluororesin such as polytetrafluoroethylene (PTFE).

  As described above, the disc case has the guide member 30 as the disc guide member according to the present invention, as shown in FIG. The guide member 30 is detachable from the upper side with respect to the case body 10 and includes a plurality of guide plates 31.

  The guide member 30 has a rectangular frame 32 that is fitted and attached to the opened upper portion of the case body 10. The frame 32 is formed of the same material as that of the case main body 10 described above. Handles 33 and 33 are formed at the front end portion and the rear end portion of the frame 32, respectively. Further, the frame 32 has a pair of beam portions 34, which are positioned corresponding to both sides of the partition wall 21 when mounted on the upper portion of the case body 10. That is, when the frame 32 is mounted on the upper portion of the case body 10, the one side portion and one beam portion 34 correspond to one storage lane 10a, and the other side portion and the other beam portion. 34 corresponds to the other storage lane 10a.

In addition to the materials described above, for example, a synthetic resin material having an Asker A hardness of about 80 and a specific gravity of 0.6 g / cm ^{3 to} 0.7 g / cm ³ can be used as the material forming the frame 32. .

  FIG. 7 is a perspective view showing a configuration of a guide member in the disk case.

  As shown in FIG. 7, the guide member 30 has a plurality of guide plates 31 corresponding to the plurality of grooves of the case body 10 when mounted on the case body 10. That is, these guide plates 31 are formed in a substantially T-shaped flat plate shape, and both upper end portions are attached to and supported by the outer portion of the frame 32 and the beam portion 34, and the frame 32 is attached to the case main body portion 10. When attached, the central hanging portion is made to enter the storage lane 10a. At this time, these guide plates 31 are arranged so as to be in positions corresponding to the ribs 24 of the case main body 10, that is, arranged with an interval equal to the interval between the ribs 24.

  Therefore, when the frame 32 is attached to the case body 10, the space between the guide plates 31 corresponds to the groove between the ribs 24. Therefore, each guide member 30 can guide the disk 12 inserted between the respective guide plates 31 into the groove portion of the case main body portion 10. In addition, in order to avoid the contact with the disk 12, the edge part of the both sides becomes the shape where the edge part of the both sides of the guide plate 31 was cut off in the taper shape.

  Each guide plate 31 of the guide member 30 has a polishing property with respect to the disk 12 at a position where the disk 12 contacts when the disk 12 is inserted between the guide plates 31. The protective material 35 is equivalent to or less than a polishing cloth for performing a polishing process performed after being stored in the container. That is, the polishability of the protective material 35 is equal to or less than that of the polishing cloth for carrying out the polishing process carried out in the next process after the disk 12 accommodated in the disk case is conveyed. For example, it is preferable that the polishing cloth is equal to or less than the polishing cloth for performing the final polishing treatment.

  FIG. 8 is a front view showing the configuration of the guide plate in the disk case.

  In each guide plate 31, in particular, there is a high possibility that the inserted disk 12 will come into contact with the upper edge portion and its vicinity and the central portion of the central hanging portion. Therefore, as shown in FIG. 8, each guide plate 31 includes a protective material 35 at the upper edge portion and the vicinity thereof and the central portion of the central hanging portion. This protective material 35 is installed by sticking a sheet-like material to each guide plate 31.

  The final polishing process for the disk 12 is a polishing process performed in the final stage when the polishing process for the disk 12 is performed in a plurality of stages, and the surface roughness of the disk surface is finished as a smooth surface. For this reason, the polishing is performed using a polishing cloth having the lowest polishing performance among the respective stages, that is, a polishing cloth having a small polishing allowance. Each guide plate 31 is provided with a protective material 35 having an abrasiveness equivalent to or less than that of the polishing cloth having a low abrasiveness to the disk 12, so that the inserted disk 12 is damaged. Prevent damage. As the protective material 35, a polishing cloth for performing a final polishing process may be used.

  As a polishing cloth for performing a final polishing process in the production of a glass substrate for a magnetic disk, a polishing pad formed by impregnating a nonwoven fabric fiber base material with polyurethane resin and wet coagulating it into a predetermined shape is used. ing. The polishing cloth preferably has an Asker A hardness of about 60 to 80, for example, 71 ± 3. When this polishing cloth is made of a foamed resin, a large number of fine openings called “bore” are formed on the surface. In this case, the diameter of the opening (bore) is preferably 10 μm to 50 μm. The surface roughness of the polishing cloth is preferably about 3 nm to 4 nm in terms of Ra.

  In the disk case thus configured, first, the disk 12 is formed between the guide plates 31 by means such as a robot hand in a state where the guide member 30 is mounted on the upper side of the case body 10. Insert into the slit-shaped gap. The disk 12 is housed and held in the case body 10 by entering the storage lane 10 a while being guided on both sides by the guide plate 31 and inserting the peripheral edge into the groove between the ribs 24. The guide member 30 is removed from the upper side of the case main body 10 with the insertion of the predetermined number of disks 12 completed in this way.

  In this way, each disk 12 is stored and held between the ribs 24 in an upright state. These discs 12 are stored in a state where all the discs 12 have their front and back orientations aligned, for example, the front side faces the front wall 16 and the back side faces the rear wall 18. When a predetermined number of disks 12 are stored in the plurality of case main body portions 10, the plurality of case main body portions 10 are stored and transported in a stacked state. This stacking is performed so that the front and back directions of the disk 12 housed in the upper case body 10 and the disk 12 housed in the lower case body 10 are aligned, that is, the upper and lower case body 10. The front walls 16 and the rear walls 18 are connected to each other.

  The disk 12 accommodated in the disk case is not particularly limited. For example, for a magnetic disk (hard disk) formed of glass, crystallized glass, ceramics, silicon, carbon, aluminum, aluminum alloy, titanium, or the like. Examples include substrates, optical disk substrates, magneto-optical disk substrates, magnetic disks (hard disks), optical disks, magneto-optical disks, and silicon wafers manufactured using these substrates.

  Further, the size of the disk 12 stored in the disk case is not particularly limited. For example, for glass substrates for magnetic disks, 22 mmφ (0.85 inch), 27.4 mmφ (1 inch), 65 mmφ (2.5 inches), 84 mmφ (3.0 inches), 95 mmφ (3.5 inches), etc. In addition, the size and thickness of the disc may be different before and after processing in each process. In such a case, by appropriately setting the size and shape of the front wall 16, the rear wall 18, the side wall 20, the partition wall 21, the ribs 24, the interval between the ribs 24, etc. Obtainable.

  When this disk case is used for the production of a magnetic disk glass substrate, the magnetic disk glass substrate that has undergone the final polishing step in the method for producing a magnetic disk glass substrate has a plurality of orientations with the front and back sides aligned. Housed in the case body 10. These case main body portions 10 are stacked and stored until inspection is performed.

[Second Embodiment]
The disc case according to the present invention is configured in the same manner as the case main body portion 10 in the first embodiment described above, and the location where the disc 12 contacts when the disc 12 is inserted into the groove, that is, each rib 24. A polishing process performed after the disc 12 has a polishing property with respect to the disk 12 is accommodated in the disk case, for example, a polishing cloth for performing a final polishing process. You may comprise the protective material 35 which is less than that.

  FIG. 9 is a front view showing the shape of the rib in the second embodiment of the disk case according to the present invention.

  Further, in this case, as shown in FIG. 9, each rib 24 may be formed so as to protrude larger inward of the storage lane 10a than in the first embodiment described above. In this disk case, each rib 24 has a polishing performance equivalent to that of a polishing cloth for performing a polishing process performed after the disk 12 is stored in the disk case, for example, a final polishing process, or By providing the protective material 35 having an abrasive property less than that, the inserted disk 12 is prevented from being damaged. As the protective material 35, a polishing cloth for performing a final polishing process may be used.

  In addition, this invention is not limited to each embodiment mentioned above, It can change suitably. For example, in the above-described embodiment, the case main body portion 10 in which the storage lanes 10 a for storing the disks 12 are formed in two rows has been described. However, the storage lane 10 a can be arranged in one row for one case main body portion 10 or It is also possible to form three or more rows. Further, when the case main body 10 having a plurality of storage lanes 10a is configured, the case main body 10 may be integrally formed, or a plurality of case main bodies 10 having one row of storage lanes 10a are connected. May be. In the case where a plurality of case main body portions 10 are connected, the case main body portions 10 may be arbitrarily combined and divided. In addition, the case body 10 can be formed with a plurality of storage lanes 10a for storing disks 12 of different sizes.

It is a perspective view which shows the structure of the disc case based on this invention. It is a perspective view which shows the structure of the case main-body part in the said disk case. It is a front view which shows the structure of the said case main-body part. It is a top view which shows the structure of the said case main-body part. It is an enlarged side view which shows the shape of the rib in the said case main-body part. It is an expansion perspective view which shows the shape of the rib in the said case main-body part. It is a perspective view which shows the structure of the guide member in the said disk case. It is a front view which shows the structure of the guide plate in the said disk case. It is a front view which shows the shape of the rib in 2nd Embodiment of the said disk case.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Case main-body part 10a Storage lane 12 Disc 16 Front wall 18 Rear wall 20 Side wall 24 Rib 30 Guide member 31 Guide plate 32 Frame 34 Beam part 35 Protection material

Claims (3)

A case body having at least an upper storage lane and a plurality of grooves for storing and holding a disk formed on the inner wall of the storage lane;
It is detachable from the upper side with respect to the case body, and is configured to have a plurality of guide plates. When the case body is attached to the case body, the space between the plurality of guide plates is between the case body. A guide member corresponding to the plurality of grooves,
Each guide plate of the guide member is located at a position where the disc comes into contact when the disc is inserted between the guide plates, and after the abrasiveness to the disc is stored in the disc case with respect to the disc. And a protective material equivalent to or less than the polishing cloth for performing the polishing treatment performed in the above, and guides the disc inserted between the guide plates into the groove portion of the case body portion. Disc case characterized by that. At least the upper part is opened, and a plurality of grooves for accommodating and holding the disk are provided on the inner wall, and these grooves have an abrasive property to the disk at a position where the disk contacts when the disk is inserted into the groove. A disc case comprising a protective material that is equivalent to or less than an abrasive cloth for performing a polishing process performed after the disc is stored in the disc case. It is detachable from the upper side with respect to a disk case having at least a storage lane open at the top and a plurality of grooves for storing and holding a disk formed on the inner wall of the storage lane, and has a plurality of guide plates. A disc guide member configured to correspond to a plurality of groove portions of the disc case between the plurality of guide plates when mounted on the disc case,
Each of the guide plates is carried out after the disc is brought into contact with the disc when the disc is inserted between the guide plates, and after the disc is polished in the disc case. A protective material equivalent to or less than the polishing cloth for performing the polishing process is provided, and the disc inserted between the guide plates is guided into the groove portion of the disc case. Disc guide member.